AutoCodes – Chevrolet – P16D1 Chevrolet

P16D1 Chevrolet Code - Intake Rocker Arm Solenoid Valve 2 Stuck On

Quick Answer

The rocker arm actuator system enables the Engine Control Module (ECM) to change the camshaft lift and duration while the engine is operating. Common causes include Faulty Intake Rocker Arm Solenoid Valve 2, Intake Rocker Arm Solenoid Valve 2 harness is open or shorted, Intake Rocker Arm Solenoid Valve 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P16D1 Chevrolet indicates Intake Rocker Arm Solenoid Valve 2 Stuck On.
Common causes: Common causes include Faulty Intake Rocker Arm Solenoid Valve 2, Intake Rocker Arm Solenoid Valve 2 harness is open or shorted, Intake Rocker Arm Solenoid Valve 2 circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 4,293

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 10, 2020

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P16D1 Chevrolet Description

The rocker arm actuator system enables the Engine Control Module (ECM) to change the camshaft lift and duration while the engine is operating. The camshaft has 3 lobes for each intake valve. The inner lobe is for low lift and the 2 outer lobes are for high lift. The rocker arm solenoid valve controls the 2-step lift by controlling the oil flow to the rocker arm. In default mode, a locking pin locks the inner and outer mechanisms of the rocker arm together to provide high lift. When low lift is commanded, oil pressure retracts a locking pin within the rocker arm.
The rocker arm solenoid valve receives a signal from the ECM. The ECM controls the rocker arm solenoid valve by supplying a 12 V PWM signal. The ECM supplies a ground to the low reference circuit.

OBDII Code P16D1 Chevrolet - Intake Rocker Arm Solenoid Valve 2 Stuck On - AutoCodes.com — P16D1 Chevrolet Code - Intake Rocker Arm Solenoid Valve 2 Stuck On

What does this mean?

What are the Possible Causes of the DTC P16D1 Chevrolet?

Faulty Intake Rocker Arm Solenoid Valve 2
Intake Rocker Arm Solenoid Valve 2 harness is open or shorted
Intake Rocker Arm Solenoid Valve 2 circuit poor electrical connection

How to Fix the DTC P16D1 Chevrolet?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P16D1 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P16D1 Chevrolet code?

Need more information on how to fix the P16D1 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16D1 Chevrolet code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P16D1 Chevrolet Code

1. What does the OBDII code P16D1 mean on a Chevrolet?

P16D1 indicates that the Intake Rocker Arm Solenoid Valve 2 is stuck in the "on" position, affecting the engine's variable valve timing system.

2. What are common symptoms of the P16D1 code on a Chevrolet?

You may notice a check engine light, rough idling, reduced engine performance, poor fuel economy, or difficulty starting the vehicle.

3. What causes the P16D1 code to trigger?

Common causes include a faulty intake rocker arm solenoid valve, oil contamination or sludge, low oil pressure, wiring issues, or a malfunctioning engine control module (ECM).

4. Can I drive my Chevrolet with a P16D1 code?

Driving with this code is not recommended as it can lead to further engine damage, reduced performance, and increased emissions.

5. How can I fix the P16D1 code on my Chevrolet?

Inspect the intake rocker arm solenoid valve for damage, clean or replace it if necessary, check the oil level and quality, and ensure all wiring and connectors are intact.

6. Is the P16D1 code related to oil issues?

Yes, poor oil quality, contamination, or low oil pressure can cause the solenoid valve to stick, triggering the P16D1 code.

7. How much does it cost to repair a P16D1 code on a Chevrolet?

Repair costs can range from $150 to $400, depending on whether the solenoid valve needs replacement or if additional diagnostics and repairs are required.

8. Can a faulty ECM cause the P16D1 code?

While rare, a malfunctioning engine control module (ECM) can misinterpret signals and trigger the P16D1 code. This should be checked after ruling out mechanical issues.

9. How do I diagnose a P16D1 code on my Chevrolet?

Use an OBDII scanner to confirm the code, inspect the intake rocker arm solenoid valve, check for oil contamination, and test the wiring and circuits for continuity.

10. What happens if the P16D1 code is ignored?

Ignoring the P16D1 code can lead to long-term engine damage, reduced performance, and costly repairs as the variable valve timing system fails to operate correctly.